Crosshead



Aug.,4, 193 S.-GIUSTINIANII 1,317,684

CROSSHEAD Fi led Oct. 19, 1929- 2 SheetsSheet 1 ja/ra fore 6/ Z/:// 7/27/7 1:

duomg g- 4, 1931- s. GIUSTINIANI 1,317,684

CROSSHEAD Filed Oct. 19. 1929 2 Sheets-Sheet 2 Patented Aug. 4, 1931 SALVATORE GIUSTINIANI, OF NEW YORK, N. Y.

onossnnni) Application filed October 19, 1929. Serial No. 400,994.

The subject matter of the present invention relates generally to machine elements and the improvements are direct to a novel form of cross'head wherein simplicity of structure and adjustability of parts are paramount features. As will presently appear it is proposed to provide a device of the above-mentioned character wherein the wearing away of the parts may be compensated for in an exceedingly facile and inexpensive manner; all within a remarkably short space of time.

The invention is also featured by the provision of a cross-head comprising but a few simple parts and arranged so that those parts subjected to the most wear may be readily re-adjusted, or substituted by other parts, without disconnecting the entire device from V the usual guide-bars. It is also the aim of the present invention to produce a cross-head, of the above-mentioned character, having a main body portion formed as a single casting, the latter. being formed to receive the several removable parts, and to be positioned with respect to the cylinder and driving wheels to afford easy access during the changing or substitution of worn parts.

As will be pointed out hereinafter, the parts ordinarily receiving the most wear, during the operation of the device, are arranged so that slight wear may be compen sated for by the use of shims, or the like, and, as a matter of fact it is within the realm of the device to permit of the insertion of a plurality of shims before it becomes necessary to actually substitute the worn parts for new ones. With these objects in view, together with others which will appear as the description proceeds, the invention resides. in the novel formation, combination and arrangement of.

parts, all as will be described more fully hereinafter, illustrated in the drawings, and particularly pointed out in the claims;

In said drawings Figure l is a sidev elevation of my novel and improved cross-head showing its asso ciation with a pair of guide bars, the usual piston rod and driving rod being omitted.

,Fig. 2 is an end view thereof with the guide bars omitted. r i

Fig. 3 is a vertical sectional view taken substantially on the line 33 of Fig. 1.

Fig. 4 is a plan View of the cross-head shown in Fig. 2.

- Fig. 5 is a sim1lar View with. the upper gib removed. 4

Fig. 6 is also a plan. view with the upper gib, the fillet and the side or retaining plate removed.

Fig. 7 is a fragmentary sectional view taken on the line 77' of Fig. 2, illustrating the means for securing one of the gibs to the casting.

Fig. 8 isa plan view of the fillet, as it appears in Fig. 5.

Fig. 9' depicts onev of. the'shims.

Referring nowniore in particular to the accompanying drawings, wherein like characters of reference denote similar parts, throughout the several views, let 10 indicate generally my unique cross-head which is. adapted to. be positioned between the guide. bars 11 and 12. l-Vhile the drawings illustrate a cross-head operable between guide bars, it will, of course, be understood that it is readily adapted for use with one guide bar by the simple expedient of discarding the lower gib and the several component parts associated therewith.

In the double-form about. to be described, the parts associated with the upper and lower gibs are identical in structure, and hence a detailed description of one is deemed suflicient for aclear understanding of the other.

In' the form shown in the' drawings, the main body portion 13 is formed from a single casting, and comprises side walls 14: and 15, (see Fig. 3), having aligned apertures 16 for the reception of a suitable wrist-pin whereby the usual piston rod and driving rod arecon neoted. The bridge portionsl? and 18, which connect said side walls are. adapted to support the upper and lower gibs, 191 and respectively, each of said gibs having associated therewith, fillets 21 and retaining plates 22.

'From the foregoing it will be seen that my 3 cross-head comprises a main casting, upper and lower gibs, each gib having a fillet and retaining plate associated therewith. A detailed description of these parts will now ensue.

As clearly shown in Fig. 3, said main body portion 13 has its side wall 14 extended upwardly to present an upstanding flange 23, while the bridge portion 17, and, of course, the bridge portion 18, are also flanged, as indicated at 24 and 25, (see Fig. 6), the said flanges 24 and 25 being slightly shorter than flange 23 to receive the guide bars, as will be well understood. It will also be observed in Fig. 6, that each of the bridge portions 17 and 18 is provided with transverse canals 26 and 27, which communicate with canal 23 disposed at right angles therewith. As shown in Fig. 3, said sine wall 15 has its upper and lower edges terminating flush with the faces of said bridge portions 17 and 18 and hence is devoid of the flanged construction provided for sidewalls 13, just described. Said side wall 15 is, however, horizontally recessed as indicated at 29 to receive the retaining plates 22, as will presently appear.

It should be remembered that the fore going applies to a single casting which includes apertured side walls, up aer and lower bridge portions, each of said bridge portions being bounded by flanges on three sides, the remaining side being devoid of a flange to facilitate the removal of a gib.

The gibs 18 and 19 are similar in construe tion and each is provided with spaced lugs 30 and 31, adapted to be received in canals 26 and 27, respectively, one side thereof being flanged, as indicated at 32, and adapted to be exteriorly engaged by a retaining plate 22, as shown in Fig. 3.

The fillet 21, shown in Fig. 8, has its base portion 34 formed similar to canal 28, (see Fig. 6) and is snugly received therein, as shown in Fig. 5, while the flange 35 thereof abuts the inner face of said flange 23 of side wall 14, as clearly depicted in Fig. 3, and it will be observed that the inner side walls of said flange 35 and the flange 32 enthe lateral sides of the guide bars while the faces of said gibs 19 and 20 engage the other bearing portions of said bars.

The retaining plates 22 are shaped to be received within the recesses 29, as shown in Fig. 3, while the upper portion of the top retaining plate, and also the lower portion of the bottom retaining plate, are shaped to engage the edges of said flange 32, as shown in Fig. 4, so that said flange is embraced at its edges in line with the inner face of said flange 32. The flange 24 is also arranged to engage the edge of the flange 35 of said fillet 21 as indicated at 36 in Fig. 5, while flange 25 is cutaway, as shown at 37, in Figs.

2 and 5, to permit the removal of the fillets 21, as will presently appear.

In assembling the structure, the fillets 21 are placed so the base portion 34 of each, is within the canal 28, as shown in Fig. 5. Then the selected gib, either 19 or 20, is placed over the respective bridge 17 and 18 with the lugs 30 and 31 within the canals 26 and 27 respectively, and in this connection it will be observed in Fig. 3 that each of the bridge portions 17 and 18 are bored, as indicated at 38, while the gibs 19 and 20 are threadedly apertured, as indicated at 39, to receive screws 40, whereby said gibs are firmly anchored in position. As a final step the retaining plates 22 are fitted within the recesses 29 and secured in position by means of bolts 41, passed through apertures 42 and 43 form respectively in the side wall 15 and the plates 22. The crosshead is now complete and assembled with the guide bars 11 and 12 as shown in Fig. 1. However, after such assembling it becomes necessary to compensate for wear in the gibs and in this connection the bolts 41 are first removed so that the retaining plates 22 may be released from the recesses 29. As a next step the bolts 40 are removed which permits of lateral sliding of the gibs from beneath the guide bar, and finally the fillets 21 are withdrawn by way of the cutaways 37 after being lifted from the canal 28. In this connection it will be noted that since base portion 34 of said fillet is normally below said gib 19, the removal of said gib leaves ample room to permit the elevation referred to. It will further be observed that it is impossible to remove the fillets prior to the removal of the gibs, since the arcuate formation of said lugs, as indicated at 44, (see Fig. 4) fits into the concavities 45 of the base portion of said fillets, and a locking action is secured. The gibs and fillets having been removed, their substitutes are applied by first introducing the new fillet through the cutaway 37, applying the new gib within the canals 26 and 27, re-securing bolts 40 and finally the retaining plate is aflixed and anchored in position by means of bolts 41.

Ordinarily, the wear on the parts is not suflicient to require the replacement of new parts, and in this connection a shim or shims 46 may be inserted beneath the gibs to compensate for the surface wear. On inspection of Fig. 9, it will be observed that the shim 46 is cutaway as indicated at 460/, and 47 to coincide with the lugs 30 and 31. In Fig. 9 the size of the shim has been reduced, but it will be understood that its dimensions agree with those of the gibs. During the application of the shims, it is not necessary to remove the fillets, as is quite obvious.

As shown in Fig. 4, the bearing surface of the gibs may be suitably grooved, as at 48, for lubricating purpose.

Various slight changes might be made in the general form and arrangement of the parts described Without departing from the invention, and hence I do not limit myself to the precise details set forth, but consider myself at liberty to make such changes and alterations as fairly fall Within the spirit and scope of the appended claims.

I claim:

1. A cross-head comprising a main body portion having side Walls and connecting bridge portions, each of said bridge portions having a side flange, said bridge portions each having canals disposed at right angles to each other, a fillet presenting a flanged portion adapted to abut the flange of one of said bridge portions and further having a base portion adapted to be removably seated in one of said canals, a gib having a flange and including lugs adapted to seat in said canals at right angles to said fillet and a retaining plate carried by said body portion and adapted to permit the removal of said gib Without disconnecting the cross-head from its guides.

2. A cross-head comprising a main body portion having side Walls and a connecting bridge portion flanged on three sides, the upper face of said bridge portion presenting transverse spaced canals and a communicating longitudinally disposed canal, a flanged fillet having a base portion adapted to be removably seated in said last-named canal, a

flanged gib having lugs adapted to be removably seated in said transverse canals and to overlie said base portion of said fillet, means for securing said gib tosaid bridge portion and a retaining plate carried by said body portion and adapted to abut said gib and to 7 permit the lateral removal thereof.

3. A cross-head comprising a main body portion having side Walls and a connecting bridge portion flanged on three sides, the upper face of said bridge portion presenting transverse spaced canals and a communicating longitudinally disposed canal, a flanged fillet having a base portion adapted to be removably seated in said last-named canal, a flanged gib having lugs adapted to be removably seated in said transverse canals and to overlie said base portion of said fillet, means for securing said gib to said bridge portion,

a flanged retaining plate carried by said body 7 portion and adapted to abut said gib, and means for securing said plate to said body portion whereby said gib may be removed laterally of the former, one of the flanges of said bridge portion being cutaway to permit the removal of said fillet after the removal of said gib.

In testimony whereof I affix my signature.

SALVATORE GIUS'IINIANI. 

